Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/MacNab01/WilliamShepherdsCollections.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8177-WilliamShepherdsCollections.ps) >>/Users/jc/w/tmp/Tune-8177-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/MacNab01/WilliamShepherdsCollections.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Coll_81773.log 674012 Log file, useful mostly for debugging
Tune-8177-WilliamShepherdsCollections.abc 168 ABC music file with the extracted tune(s)
Tune-8177-WilliamShepherdsCollections.ps 6 PostScript
Tune-8177-WilliamShepherdsCollections.txt 168 Plain-text file with the extracted tune(s)
Tune-8177-get.log 4449 Log file, useful mostly for debugging
Tune-81772-get.log 10084 Log file, useful mostly for debugging
Tune-81775-get.log 4402 Log file, useful mostly for debugging
Tune-81776-get.log 4402 Log file, useful mostly for debugging
Tune-81777-get.log 4537 Log file, useful mostly for debugging
Tune-81779-get.log 4416 Log file, useful mostly for debugging
These files should be available for 24 hours.